(evolved Multimedia Broadcast/Multicast Service)
3GPP is a standard technology for public safety communication networks and PS-LTE (Public Safety-LTE) technology is adopted as a standard. The National Disaster Communication Network also adopts PS-LTE technology as a standard specification. The GCSE (Group Communication Service Enabler) standard technology specified by PS-LTE defines the multicast type group communication service using the eMBMS system, in order for a large number of emergency responders on the disaster scene to smoothly establish group communication in the same cell. The Uangel eMBMS system has successfully demonstrated eMBMS-based PS-LTE on a commercial LTE network for the first time in the world, along with global communication service providers and equipment vendors.
|BM-SC (Broadcast/Multicast Service Centre)||Receiving group communication data from the GCS AS or GCS GW, and broadcasting it in the pertinent area and entire area.|
|MBMS GW (MBMS Gateway)||Performing a function of transferring the BM-SC’s control signal to EPC, and propagating the broadcasting data of the BM-SC to eNB.|
|GCS GW (Group Communication Service Gateway)||A system that performs eMBMS functions separately among GCS AS functions, and enables large-scale group communication by interfacing the PTT server.|